Search Results

4 results for “earthquake”

Formulae (4)

M = \log_{10}\frac{A}{A_0}

Earthquake magnitude from seismograph amplitude.

\log_{10} E = 4.8 + 1.5\,M

Energy released by a quake of Richter magnitude M.

M_w = \tfrac{2}{3}\log_{10} M_0 - 10.7

Modern magnitude from the seismic moment of a quake.

\log_{10}E = 4.8 + 1.5M

Approximate energy released by an earthquake.